Leon,
Just so that you know, a surefire is a fantastic torch. It takes 2, CR123A batteries. They cost £1 each. £2 of batteries last about an hour of use. A good LED torch takes two lithium batteries (AA). Two lithium batteries (AA) cost about the same. Not as bright by a long call - but you will get 100 hours out of one set of batteries.
Don't get me wrong, I have a G2 and and E2 surefire, but for you, with your disposable cash, I think Spamels wrong (sorry mate) and an LED is the way to go - either head torch or pencil type. Surefires are ultimately "tactical" torches designed for massive illumination in short bursts (often attached to a weapon). Not "round the campfire" stuff. Buy a Petzl headtorch for the same cash (really)
Red